Starship Asterisk*

Thanks Chris for your reply.

What particular radiation wavelengths can do still amazes me. For example I'm always in awe that I can turn on my TV and see images or switch on a light socket and there is light! I'll clearly never make it as a scientist, though I think I'm well past that stage now anyhow! :)

[quote="DavidLeodis"]I also learnt something! Through the "radiation" link I found out that microwaves (as in a microwave oven) are lower frequency than visible light waves.[/quote]
It might be helpful to remember that the microwave background we see all around us is redshifted light. That is, we are seeing energy that was emitted around the wavelength of visible light, and has been stretched into microwaves by 13.7 billion years of cosmic expansion.

[quote]As microwaves cook food very fast I would have guessed they were higher frequency and I would also have guessed that higher frequency meant more powerful.[/quote]
Higher frequency photons are more energetic than lower frequency ones. But the total energy depends not just on the frequency, but the intensity. To further complicate things, the reason that microwaves are so effective at heating food is because their wavelength corresponds to a frequency that dipolar molecules (like water) readily absorb.

I like the image. Simple and uncluttered.

I also learnt something! Through the "radiation" link I found out that microwaves (as in a microwave oven) are lower frequency than visible light waves. As microwaves cook food very fast I would have guessed they were higher frequency and I would also have guessed that higher frequency meant more powerful. Apologies to the scientists among you all for my lack of what is probably basic knowledge. I shall hang my head in shame for not knowing. :) :oops:

[quote="biddie67"]The nebula reminds me of those fabulous back-lit "dancing waters" displays that you can see around in tourist areas.[/quote]
[youtube]http://www.youtube.com/watch?v=vfX4QHKjaAQ&feature=related[/youtube]

Good Grief - those Greek Gods had such a difficult social life .......


P.S. The nebula reminds me of those fabulous back-lit "dancing waters" displays that you can see around in tourist areas.

[quote="APOD Robot"][url=http://apod.nasa.gov/apod/ap100612.html][img]http://apod.nasa.gov/apod/calendar/S_100612.jpg[/img] [size=150]The Medusa Nebula[/size][/url]

Like its [url=http://en.wikipedia.org/wiki/Medusa]mythological[/url] namesake, the nebula is associated with a dramatic transformation.[/quote]
[quote=" http://en.wikipedia.org/wiki/Medusa"]

In Ovid (Metamorphoses 4.770), Medusa was originally a beautiful maiden, "the jealous aspiration of many suitors," priestess in Athena's temple, but when she and the "Lord of the Sea" Poseidon lay together in Athena's temple, the enraged Athena transformed Medusa's beautiful hair to serpents and made her face so terrible to behold that the mere sight of it would turn onlookers to stone. While Medusa was pregnant by Poseidon, god of the sea, she was beheaded by the hero Perseus, who was sent to fetch her head by King Polydectes of Seriphus as a gift. With help from Athena and Hermes who supplied him with winged sandals, Hades' cap of invisibility, a sword, and a mirrored shield, he accomplished his quest.

[size=130][color=#0000FF][b]The hero slew Medusa by looking at her harmless reflection in a mirror
instead of directly at her to prevent being turned into stone:[/b][/color][/size]
[quote=" http://bf-astro.com/outhouse.htm"]

[size=150]Bob Franke's Old (Seattle) Observatory (a.k.a. Outhaus-West)[/size]
[img]http://bf-astro.com/images/obs1a.jpg[/img][img]http://bf-astro.com/images/obs2a.jpg[/img][/quote]
When the hero sEVERED Medusa's head from her neck, two offspring sprang forth:
the winged horse Pegasus and the golden giant Chrysaor.

In Odyssey xi, Homer does not specifically mention the Gorgon Medusa:
[list] "[color=#0000FF]Lest for my daring Persephone the dread,
From Hades should send up an awful monster's grisly head.[/color]"[/list]
[img]http://www.anticomercante.com/Gorgonzola20Naturale.jpg[/img]
[quote=" http://en.wikipedia.org/wiki/Gorgonzola_%28cheese%29"]

<<Gorgonzola is a veined Italian blue cheese, made from unskimmed cow's and/or goat's milk. It can be buttery or firm, crumbly and quite salty, with a 'bite' from its blue veining. It has been made since the early Middle Ages, but became marbled with greenish-blue mold only in the eleventh century. Gorgonzola is made in the regions of Piedmont and Lombardy from whole cow's milk, to which is added lactic acid bacteria, along with spores of the mold Penicillium glaucum.>>[/quote][/quote]

I ate a spearmint leaf
And thought I had my fill of mints
That bad hair with pulverized planets
Grandstar

Medusa -- updated.

Rob
[attachment=0]2861_1431_bad-hair-day.jpg[/attachment]

I just can't think of a thing to say except - eewww!!! - where's a Kraken when you need one :?:

[quote="Ann"]I'm trying to make it to a hundred posts and earn my green ears as a science officer, so... here is a bad hair day for Medusa!

Ann[/quote]

I'm working on 50 and then I will slow down--NOT!
[img]http://crashlanden.files.wordpress.com/2010/04/medusa.jpg[/img]
From 1981 Clash of the Titans at [url]http://crashlanden.files.wordpress.com/2010/04/medusa.jpg[/url]

I'm trying to make it to a hundred posts and earn my green ears as a science officer, so... here is a bad hair day for Medusa!

[img]http://koolmornings.files.wordpress.com/2009/09/bad-hair-day-for-medusa.jpg[/img]

Ann

[url=http://apod.nasa.gov/apod/ap100612.html][img]http://apod.nasa.gov/apod/calendar/S_100612.jpg[/img] [size=150]The Medusa Nebula[/size][/url]

[b] Explanation: [/b] Braided, serpentine filaments of glowing gas suggest this nebula's popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old [url=http://www.seds.org/messier/planetar.html]planetary nebula[/url] some 1,500 light-years away in the constellation [url=http://en.wikipedia.org/wiki/Gemini_(constellation)]Gemini[/url]. Like its [url=http://en.wikipedia.org/wiki/Medusa]mythological[/url] namesake, the nebula is associated with a dramatic transformation. The [url=http://www.noao.edu/jacoby/pn_gallery.html]planetary nebula[/url] phase represents a final stage in [url=http://casswww.ucsd.edu/public/tutorial/StevI.html]the evolution[/url] of low mass stars [url=http://www.astro.washington.edu/balick/WFPC2/]like the sun[/url], as they transform themselves from red giants to hot white dwarf stars and in the process shrug off their outer layers. Ultraviolet [url=http://hyperphysics.phy-astr.gsu.edu/hbase/ems1.html]radiation[/url] from the hot star powers the nebular glow. The Medusa's transforming star is near the center of the overall bright [url=http://www.noao.edu/outreach/aop/observers/medusa.html]crescent shape[/url]. In [url=http://bf-astro.com/sh2-274/sh2-274.htm]this deep, wide telescopic view[/url], fainter filaments clearly extend below and to the left of the bright crescent region. The [url=http://www.noao.edu/image_gallery/html/im1054.html]Medusa Nebula[/url] is estimated to be over 4 light-years across.

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